I believe this is planned drama by BJP think-tank.
1. BJP know nuclear deal is also their choice.
2. For CPM party congrass is no more enemey and they will do anything to defeat BJP. So the survival of Man Mohan govt after the Karat pull out of the power plug is nice kick in the butt treatement.
Advani and crew is wise. They are winning already the election with their strategies. Good job Advani